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18-letter words containing d, i, r, g

  • radiometric dating — any method of determining the age of earth materials or objects of organic origin based on measurement of either short-lived radioactive elements or the amount of a long-lived radioactive element plus its decay product.
  • radius of gyration — the distance from an axis at which the mass of a body may be assumed to be concentrated and at which the moment of inertia will be equal to the moment of inertia of the actual mass about the axis, equal to the square root of the quotient of the moment of inertia and the mass.
  • ragtag and bobtail — the riffraff; rabble: The ragtag and bobtail of every nation poured into the frontier in search of gold.
  • rain cats and dogs — water that is condensed from the aqueous vapor in the atmosphere and falls to earth in drops more than 1/50 inch (0.5 mm) in diameter. Compare drizzle (def 6).
  • rear its ugly head — the upper part of the body in humans, joined to the trunk by the neck, containing the brain, eyes, ears, nose, and mouth.
  • red-light district — an area or district in a city in which many houses of prostitution are located.
  • reduction strategy — (theory)   An algorithm for deciding which redex(es) to reduce next. Different strategies have different termination properties in the presence of recursive functions or values. See string reduction, normal order reduction, applicative order reduction, parallel reduction
  • refrigerated lorry — a lorry which is chilled in the back as for storing food
  • reggio di calabria — a seaport in S Italy, on the Strait of Messina: almost totally destroyed by an earthquake 1908.
  • registered charity — official aid organization
  • registered company — a company which has officially registered its business
  • residual magnetism — remanence.
  • resistance welding — welding utilizing pressure and heat that is generated in the pieces to be welded by resistance to an electric current.
  • retrograde amnesia — a memory disorder characterized by an inability to remember events or experiences that occurred before a significant point in time.
  • rhyming dictionary — a specialist dictionary organized by the final sounds of words, used to write poetry
  • richard p. gabriel — Richard Gabriel
  • risk based testing — (testing)   Testing based on identification of potential risks (or "candidate risks"), which should be analysed by the project stakeholder or which might appear during the project's development.
  • rotational molding — a method for molding hollow plastic objects by placing finely divided particles in a hollow mold that is rotated about two axes, exposing it to heat and then to cold.
  • rufous hummingbird — a reddish-brown hummingbird, Selasphorus rufus, of western North America.
  • run length limited — (storage)   (RLL) The most popular scheme for encoding data on magnetic disks. RLL packs up to 50% more data on a disk than MFM. Groups of bits are mapped to specific patterns of flux. The density of flux transitions is limited by the spatial resolution of the disk and frequency response of the head and electronics. However, transitions must be close enough to allow reliable clock recovery. RLL implementations vary according to the minimum and maximum allowed numbers of transition cells between transitions. For example, the most common variant today, RLL 1,7, can have a transition in every other cell and must have at least one transition every seven cells. The exact mapping from bits to transitions is essentially arbitrary. Other schemes include GCR, FM, Modified Frequency Modulation (MFM). See also: PRML.
  • saint george's day — April 23, celebrated in parts of the British Commonwealth in honor of the patron saint of Britain and especially in New Zealand as a bank holiday.
  • seafloor spreading — a process in which new ocean floor is created as molten material from the earth's mantle rises in margins between plates or ridges and spreads out.
  • secondary diagonal — a diagonal line or plane.
  • secondary offering — the sale of a large block of outstanding stock off the floor of an exchange, usually by a major stockholder.
  • selective breeding — the raising of animals with particular genetic traits through careful choice of parents
  • self-comprehending — to understand the nature or meaning of; grasp with the mind; perceive: He did not comprehend the significance of the ambassador's remark.
  • self-deprecatingly — in a self-deprecating manner
  • self-disparagement — the act of disparaging.
  • self-understanding — mental process of a person who comprehends; comprehension; personal interpretation: My understanding of the word does not agree with yours.
  • shift one's ground — to change one's argument or defense
  • skin friction drag — aerodynamic resistance or drag due to the contact of moving air with the surface of an airplane, a glider, etc.
  • slim hole drilling — Slim hole drilling is drilling a well in which at least 90 percent of the hole has a diameter of seven inches or less.
  • song without words — a song which only consists of a tune or melody and does not have any lyrics
  • spread one's wings — to make full use of one's abilities
  • squinting modifier — a word or phrase that can modify either the words that precede it or those that follow, as frequently in the sentence Studying frequently is tedious.
  • standard of living — a grade or level of subsistence and comfort in everyday life enjoyed by a community, class, or individual: The well-educated generally have a high standard of living.
  • strathclyde region — a former local government region in W Scotland: formed in 1975 from Glasgow, Renfrewshire, Lanarkshire, Buteshire, Dunbartonshire, and parts of Argyllshire, Ayrshire, and Stirlingshire; replaced in 1996 by the council areas of Glasgow, Renfrewshire, East Renfrewshire, Inverclyde, North Lanarkshire, South Lanarkshire, Argyll and Bute, East Dunbartonshire, West Dunbartonshire, North Ayrshire, South Ayrshire, and East Ayrshire
  • strong derived set — the set of all strong accumulation points of a given set.
  • submaxillary gland — submandibular gland.
  • summary proceeding — a mode of trial authorized by statute to be held before a judge without the usual full hearing.
  • super middleweight — a boxer weighing up to 168 pounds (75.6 kg), between middleweight and light heavyweight.
  • superciliary ridge — browridge.
  • supraorbital ridge — browridge.
  • tender loving care — considerate and kindly care, as of someone who is ill, upset, etc
  • the grand national — an annual steeplechase run at Aintree, Liverpool, since 1839
  • theodore gericault — (Jean Louis André) Théodore [zhahn lwee ahn-drey tey-aw-dawr] /ʒɑ̃ lwi ɑ̃ˈdreɪ teɪ ɔˈdɔr/ (Show IPA), 1791–1824, French painter.
  • thin on the ground — If people or things of a particular kind are thin on the ground, there are very few of them.
  • third man argument — (in the philosophy of Aristotle) the argument against the existence of Platonic Forms that since the Form of Man is itself a perfect man, a further form (the "third" man) would be required to explain this, and so ad infinitum
  • three-day eventing — participation in a three day equestrian competition consisting of dressage, cross-country jumping, and stadium jumping
  • to a grinding halt — If you describe a bad situation as grinding, you mean it never gets better, changes, or ends.
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